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Leases - Schedule of Reconciliation of Undiscounted Cash Flows for Operating and Finance Lease Liabilities (Detail) $ in Thousands	Jan. 31, 2020 USD ($)
Finance Lease [Abstract]
2020	$ 5,923
2021	3,959
2022	2,175
2023	1,049
2024	645
Later years	3,601
Total minimum lease payments	17,352
Amounts representing interest	1,601
Present value of minimum lease payments	15,751
Operating Lease [Abstract]
2020	19,986
2021	17,820
2022	16,007
2023	13,377
2024	11,773
Later years	66,349
Total minimum lease payments	145,312
Amounts representing interest	11,040
Present value of minimum lease payments	$ 134,272

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